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Messages - lavrgs

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General Mach Discussion / It may be time to start over...NEED HELP
« on: April 06, 2021, 06:04:08 PM »
yeah I know that it's a deep well but I need help.
I have a Tree J325 that I retrofitted, a long time ago, with a set of Gecko G320 a Campbell design breakout board and Mach3. Since I was - and still am - new to machine control I have several areas that I need to prospect for information on.

The machine has generally been unreliable and it's probably operator error. For example, I ran the Geckos with the error/reset pin 5 connected to pin 7. Now that I have them disconnected I am running into  fault conditions that I didn't have - now they are a constant problem. For example when I do a "home all" I will get the z and x drives to fault - not sure why y is doesn't fault... Is it possible limit switches are involved? I am terrible a troubleshooting...At this point I probably need to go through the entire setup of Mach3 from the beginning but there are other areas I want to address along the way.
- I would like all axes to stop on error. I've had situations where an axis got off track and the machine kept running and ruined parts
- I don't have any relays, contactors etc set up to help with e-stop. I don't know anything about the requirements, circuit etc. But I need to learn.

I spent some time considering an improved control system like Centroid Acorn or Allin1dc but for the next short period of time I want to see what improvements can help towards getting a reliable machine that I feel confident using.
I feel the machine is in good shape and capable of much more than I have done with it - with that said I have done some small surfacing jobs but the last time I tried to make a surfaced item the machine got out of control.

I could go on and on but for now I want to focus on Mach3 and Geckos


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General Mach Discussion / Re: Spindle speed control
« on: October 14, 2010, 01:11:42 PM »
I would say that the numbers in that tab  haven't been changed - and probably should be . From memory the steps/per is set to 20000 and the velocity is set to 60. This is probably the area I need to investigate. I read that for a 3600 RPM motor 60 is a good number so for a 6000 RPM motor 100 seems to be the number. The one problem I need to address is why my 6000 RPM Motor is only going to 4500 RPM. Could this be contributing to the factor of 2.44 that requires me to put 11000 in the max pulley speed?

The one area of my mill that is more capabile  is the spindle. I am using a Control Techniques Spindle drive and probably need to tune there and within Mach3. For example the spindle drive can be set up to provide full torque at low speeds but I can stop the spindle by hand at 30 RPM

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General Mach Discussion / Re: Spindle speed control
« on: October 14, 2010, 11:12:34 AM »
What I meant was that to be able to get the speed to run close to the speed input I had to set the pulley max speed to 11000. For example I want the spindle to turn at 1200 RPM. When I use 11000 as the maximum pulley speed the actual motor speed is around 1200 when I tell it to go 1200. If I put the max pulley speed at 6000 an input of 1200 would have me running very close to around 3000 rpm.

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General Mach Discussion / Re: Spindle speed control
« on: October 14, 2010, 12:21:00 AM »
I was able to fix it - I deleted the linearity.dat file and pressed reset (not sure if that really did the trick but after my original post I continued to search the forum and found a post that mentioned deleting the linearity.dat file. A new one was created wihen I started Mach3. I ended up getting the speeds to correspond to the input by change the max speed on pulley 1. my spindle seems to get to 4500RPM (although it should go to 6000) and I used 11000 as the max RPM for pulley1. This gave me measured numbers pretty close to the set speeds. Now my question is why does the max speed have to be 2.44 times the actual max speed, what is causing this ...the ratio?  I think I changed it once and the measured speed did not change...but I'm getting a bit fuzzy...

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General Mach Discussion / Spindle speed control
« on: October 13, 2010, 11:14:33 PM »
This past weekend I decided to try the spindle calibration procedure...that was a mistake... Prior to doing this I could type in a spindle speed and use the slider to raise or lower the speed but after the calibration the spindle only goes full speed. If I re run the calibration it will start slow and speed up so some kind of control is possible but just not usable. Does the calibration change something in a file that I can either disable or fix?

Bill

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General Mach Discussion / Limit - Homing Problem
« on: December 03, 2009, 08:33:48 PM »
I watched the video and read a bunch of posts but it seems my answer wasn't there...
I have a couple problems

1. When I start the machine and reference all the axes the Machine coordinates go to 0.500 just like they should, because I have it set to move 0.50 off the limit switch. The problem is that I am nowhere near the limit switch and the machine thinks its home...I'm sure there is some setting that is off ?t I don't recall changing anything and it was working ok.

2. I currently have the y axis set to Home Negative because it won't home to +Y. Any Ideas - are these two problems related?
I'm pretty new to all this and thought maybe the problem is caused by soft limits - I extended the soft limits to beyond the travel the table id capable of and no real change..unless I didn't push the magic butoon or something...

I'm going out to have another go at it because it seems that after I write about a problem it goes away...8-)


Bill

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Mach Screens / Re: What do I need for touch screen interface?
« on: July 17, 2009, 01:32:57 PM »
Are the overlays reliable? Can I assume there is some kind of software included to map locations and function? Until recently I did not know about them and was looking at monitors with the touch screen included.

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